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林业科学 ›› 2002, Vol. 38 ›› Issue (3): 160-166.doi: 10.11707/j.1001-7488.20020328

• 问题讨论 • 上一篇    下一篇

刨花板厚度方向变形研究Ⅱ. 刨花板厚度方向变形模型的建立及释因

顾继友 高振华 王逢瑚 程瑞香   

  1. 东北林业大学材料科学与工程学院,哈尔滨150040
  • 收稿日期:1999-11-20 修回日期:1900-01-01 出版日期:2002-05-25 发布日期:2002-05-25

STUDIES ON THICKNESS DEFORMATION OF WOOD COMPOSITE Ⅱ. THE FOUNDATION AND COMMENTING OF DEFORMATION IN THE THICKNESS OF PARTICLEBOARD

Gu Jiyou,Gao Zhenhua,Wang Fenghu,Cheng Ruixiang   

  1. Materials Science and Engineering College, Northeast Forestry University Harbin150040
  • Received:1999-11-20 Revised:1900-01-01 Online:2002-05-25 Published:2002-05-25

摘要:

本文基于我们以往所做的众多的实验事实,从刨花板厚度方向的结构出发,全面考虑影响刨花板厚度膨胀率的因素,经过论证和筛选,建立了刨花板厚度膨胀率的方程模型:TS(t)=F(t)+f(M .C ,t)+V(t) ,即刨花板的厚度膨胀率主要取决于人造板内木材的粘弹变形恢复、人造板内木材的吸湿膨胀和胶接点破坏引起的变形;当刨花板的含水率存在较大变化时,需再加上机械吸附蠕变项A(M .C ,t)。

关键词: 刨花板, 厚度方向变形, 方程模型, 内应力

Abstract:

Based on many facts of experiments, this paper demonstrated and filtered all factors affected the thickness swelling of particleboard after considered them in care, and founded the equation model for thickness swelling of particleboard, that's TS(t)=F(t)+f(M .C ,t)+V(t) It means that the thickness swelling comes mainly from the recovery of visco-elastical deformation of wood in particleboard, hygroscopical swelling of wood in particleboard and deformation caused by destroyed glue lines between particles. When the change of moisture content in the board is rather great or obvious, the mechano-sorption creep item A(M .C ,t), shall add to the model.

Key words: Wood composite, Deformation in thickness, Equation model, Internal stress